Mammals; Work of the Service; Employees (USFWS); Personnel; Monitoring; Radio telemetry

U.S. Fish and Wildlife Service biologists Mike Jimenez (left) and Ed Bangs (right) take blood samples from a tranquilized wolf after fitting it with a radio collar during collaring operations in Yellowstone National Park May 2003. Higher resolution...

Yellowstone National Park wolf project leader Dr. Doug Smith checks the new radio collar on a tranquilized wolf during collaring operations in Yellowstone on 1-09-03. Higher resolution of this image not available.